Ordnance



A. T. DAWSON AND G. T. BUCKHAM. ORDNANCE.

APPLICATION man MAR. 19. 1920.

1,386,459, Patented Aug.. 2, 1921.

ePAiENr ottica.

AR'iiiiiRA rREvon DAWSON AND GEORGE 'riioinAsEUoKnAivipor wEsrMiNs'rEn,

LONDON, ENGLAND, AssieNoRs To vioigEns LIMITED, oEfwEsfrivIiNsrEn, LON-DON, ENGLAND.

ORDNANCE.

assenso,

Specification of Letters Patent. i `PCQTJQd Aug, 2, y19,21.

Original application filed November 11, '1918, Serial No. 262,86.Divided Aand. this application filed March 19, 1920. Serial No. 367,296.,l

To all whom, t may concer/n Be it known that we, Sir ARTHUR TREVORDAWSON, Bart., and VSir GEORGE THOMAS BUOKHAM, Knight, both subjects ofthe King of Great Britain, residing at Vickers' House, Broadway,VVestminstei', in the county of London, England, have invented certainnew and useful Improvements in or Relating to Ordnance, (for which Ihave filed application in Great Britain, No. 16680, dated November 13,1917,) of which the following is a specification.

This invention relates to ordnance, particularly anti-aircraft ordnance,having an independent line of sight and provided with verticaldeflection gear for correcting the angle of tangent elevation for atarget advancing toward or receding from the gun position.' Y

According to the invention the vertical deflection gear is mounted onthe gun carriage and operates through differential gearing to effectrelative movement between the gun Iand the sight so as to correct for anadvancing or a receding target, this differential gearing being alsooperated by the pointing gear to move .the gun and the sight together inkeeping the sight on the target.

vIn this manner the-vertical deflection gear remains .in the'sameposition whatever the angle of elevation of the gun may be.

In order that the said invention maybe clearly understood andreadilylcarriedlinto ings` in which :--A

effect, we will describe the same more fully with reference to theaccompanying draw- Figure l is Ian elevation showing a constructionalform of the invention as viewedV from the left hand side of the gun, andy Fig. 2 is a diagram of the various gears of Fig. 1.

A is the gun-carriage, B, By are the-sights,

40XX-Fig- 2) meshing` vwith a toothed arcC"V attached to the gun cradle'asis well under stood.

flection gear and the vertical deflection dial,V are situated kin theright hand side ofthe ygun and are mounted Ona vbracket 'attached to thegun carriage. F is the aforesaid Vdifl The hand wheel of theverticaldeferential gearing mounted in a casing Fx attached to the guncarriage. hand lever C drives a shaft C?, operating through the bevelwheels c, c (orthrough a The pointing Y worm and worm wheel) upon thedifferential ing arc'B3 of the sight bracket by a worm carried by ashaft CS, the ratio of the gearing being such that whenpthe hand lever Cis vlo moved, assuming that the vertical deflectionV hand wheel is notbeing moved, the sight isv moved through the same angle as the gun.

- G (Fig. 2) is the worm of the ranging gear, this worm meshing with aworin wheel v YGr with which and ywith thejaforesaid shaft o. and a wormwheel CX driven by a Worm cx 'operated by the bevel wheel c', is a-sso-V.1 Y

ciated a differential gear G2. Gi and G4 (Fig. 1) are respectively thehandwheel and the dial `ofthe ranging ge'ar.- It will be understood fromthe'foregoing that the ver- 5 i tical deflectionv gearv thus movesthe'ggun' without the sight, the ranging gear also moves the gun withoutthe sight and the pointing gear movesV the gun together with the sight.

Y That we claim Vand desire to secure by Letters Patent of theUnited`States is 1. In ordnance, the combination with the gun,- the gun cradle,'the gun carriage, the

sight mounted on the cradle, the pointing gear for elevating thegun andthe sight together and the ranging gear for elevating the gun withoutthe sight,l of a vertical deflection` operating ydevice additional tosaid rangingand pointing gears and mounted in a fixed position on thecarriage,land means y whereby .said device Operates upon part'ofV thepointing gear to move the gun in eleva-V,V

tionV with respect to the sight so yas to correct for an advancing or areceding target.

2. In ordnance, the combination, with Ythe gun, the gun cradle, the guncarriage, the

toothedarc on the cradle, and the "ranging,"

sight, the pointing gear comprising aiiop-V f Verating device and apinion meshing with; a

geen for elevating the gun Without the sight,y

of ,diiierentiztlv gearing yinterposed between szud opei'atlngdeviee andsaliciy pinion, means theglzist mentioned. device oper-etes upon said; fl f f f differential gearing Ato move the. gun inele- 'vati.en withrespect to the sight so aste ce1- ijeet for in advineing era recedingtarget.

l n testimony-Whereowe aiiix our signatures. f

i ARTHUR'TREVORDAWSON. GEORGEI THOMAS BUCKHAM;

